Kawaikereba Hentai demo Suki ni Natte Kuremasu ka? Volume 2 Chapter 4

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A little sister's all you need

Part 1

A Sunday in late June. It was a morning with a bright blue sky.

Keiki was holding the pair of pure white panties with his arms stretched towards the ceiling. No matter how you looked at it, this clearly made him look like a pervert.

"Really, whose panties are these…?"

Just recently, Keiki had found out that his new Cinderella candidate, Fujimoto Ayano, was actually a hardcore olfactophile. Basically, she's the kind of person who's turned on by a boy's body odor. She had become addicted to Keiki's smell when he caught her on the stairs, and she practically glued herself to him for days afterwards.

"Even though Fujimoto-san has a cute face, she really is a pervert through and through…"

Thinking that, Keiki decided to give up on the thought that Ayano was Cinderella.

"So, is Cinderella really one of the girls from the club…?"

The girl who is a genius when it comes to calligraphy, and who likes to play pranks on her junior: Tokihara Sayuki.

The straightforward and honestly cute angel-like Kohai: Koga Yuika.

The kind tsundere classmate: Nanjou Mao.

But all of them were perverts.

Like wanting to become Keiki's pet, or wanting him to become her slave. Keiki seriously doubted that these wishes were born out of romantic feelings.

"Mhm… I don't get it."

Though he had wished that these pure white panties belonged to a normal girl, and she had really just happened to drop them by accident, Keiki had started to believe that this wish wouldn't be granted.

"But… it's true that they're all cute."

Even though he knew their true personalities, his heart couldn't help but skip a beat whenever they showed him a bewitchingly cute smile. If you ignored the fact that they were all perverts, they were all charming women with no room for complaints.

"Would I be able to fall in love with one of them because of her cuteness, even if they're all perverts?"

In other words, 'Would I be able to accept a perverted girl?'

If one of those girls really turned out to be Cinderella, Keiki still didn't know how he would respond to their feelings.

"…I guess I'll go wash my face to freshen up."

He hid Cinderella's panties in a safe location and left his room. Having just woken up, he was wearing a normal t-shirt and shorts. He went downstairs to the first floor bathroom. When he casually opened the door…

"…Uh?"

That baffled voice came from the person currently occupying the bathroom. Her almost-shoulder-length hair was still wet, maybe because she had just finished taking a shower. She seemed to have finished putting on her panties, because she was currently holding her bra in her hands, with her breasts still enjoying some fresh air. Her slender shoulders, her cute belly button, her white legs — everything was visible, and there wasn't anything that you could complain about.

"…Hey, Nii-san?" Mizuha didn't panic at all, but only hid her breasts with her hand.

Though her cheeks were slightly flushed, she still returned the gaze of her big brother, who still couldn't look away.

"Even if we're siblings, it's still embarrassing, you know?"

"Yes! I'm very sorry!" The boy bowed down with all of his might and hurriedly closed the door.

"Ahh… that really surprised me."

Her and Keiki had lived in the same house for years. Accidentally watching the other change clothes, accidentally opening the door to the bathroom when the other was using the toilet — things like this happened fairly often. They tried their best to make sure these kinds of accidents didn't happen, and they had only happened very rarely since they had entered high school. Since his mind was somewhere else, though, Keiki had completely forgotten that Mizuha liked to take showers in the morning.

"When she's wearing clothes, she looks rather slender."

But in reality, her breasts were quite formidable in size. And her pastel green panties also really suited her. Remembering that sight made Keiki's cheeks burn up.

"…Come on, why is my heart beating so fast from seeing my little sister naked…!"

Keiki knew very well that he was a siscon to a certain agree, but even he was aware that these feelings just now were completely unacceptable. A big brother shouldn't lust after his little sister.

Though he wanted to wash his face to calm down, the bathroom was currently in use, so he had no other choice but to wait. And this was only the beginning of day.

After that, Mizuha finished putting on her clothes and came to Keiki's room. They sat on top of the bed, backs against each other, reading. Things like this would usually only be done by a young couple in love, but to Keiki and Mizuha this level of skinship was normal. Though Mizuha hadn't said anything about the incident, Keiki noticed that she was turning the pages of her book more slowly than usual.

"Hey, Nii-san?"

"Mhm, what?"

"What do you think of pastel green panties?"

"I really think that they suit you, Mizuha."

"Thanks."

"You're welcome."

At first glance, it was a really weird back-and-forth. But in order to hide their embarrassment, it was a necessary conversation to distract them from what had happened. Like a joke to lighten the mood.

"Entering the bathroom when I was in the middle of putting on clothes might've been nothing but an accident on Nii-san's part, but that doesn't mean that I didn't mind."

"I'm really sorry about that."

"It's fine. I know that you didn't do it on purpose."

There was no tone of anger to be found in her voice. It seemed like she really did forgive him.

"But it's weird. This hasn't happened since we were in middle school."

"Well, I normally am really careful about it, but it totally slipped my mind today because I was thinking about something else."

"Are you troubled by something again? Do you need someone to talk to?"

"It's a bit difficult to explain…"

"There's no need to hold back. Nii-san and I are family."

"…Oh no, I just mistook my little sister for an angel."

He really was proud of his little sister. She was like an oasis that would heal his heart every time it got hurt because of perverted girls — girls both inside and outside the club.

"Then, what would you do if I told you that I wanted to make a girl my pet?"

"Report you to the police, probably?"

"Then, what if I wanted to become a girl's slave?"

"Report you to the police."

"If I wanted to smell a girl's panties?"

"Report you to the police."

"It figures~ I'm really glad. It seems that I'm not the weird one."

"No. Asking your little sister these kinds of questions is a bit weird, though."

"Then, what would you do if I said that I wanted to fall in love?"

"Report you to the police."

"Why?!"

"I'm joking. Since Nii-san is always so serious, I would support you."

"O-Okay. Thanks."

"You're welcome. That was my thanks for you praising my panties."

"What kind of reason is that?"

With their backs to each other, they couldn't read each other's expression. But their conversation still continued.

"By the way, it seems like there's a pretty famous lucky charm for high school girls."

"Lucky charm?"

"When you want to confess to a boy, you wear pink underwear. It's supposed to bring good luck," Keiki explained.

"I know. That one's pretty popular with the girls."

"I see. It seems like it's spread pretty far…"

"Why does Nii-san know of that?"

"A certain Senpai told me."

"So that's why."

With that, the conversation stopped and they once more focused on reading their respective books. As the sunlight pleasantly shone into the room, only the sound of turning pages could be heard.

"Hey, Nii-san?"

"Mhm?"

"Sometimes, it's nice to just relax, right?"

"……Yeah."

Being with someone who lets you relax is the best. For Keiki, this was the most blissful way to spend time. His heart had been through a lot of stress lately, and he felt like he really needed something like this.

After around two hours of reading, Mizuha closed the book in her hands and stood up from the bed.

"Let's have lunch soon. Is there anything you want, Nii-san?"

"As long as it's made by Mizuha, I'm fine with absolutely anything."

"That kind of phrase is a wife's worst nightmare."

"Simple is best. How about some noodles?"

"Then, how about some spaghetti? Maybe with some minced meat," With a cheerful tone, Mizuha left the room.

"Really, Mizuha would be a great wife."

She was a cleaning fanatic, so she always kept the house spotless, and her cooking was top notch. Keiki was sure that there weren't many women with household skills like Mizuha.

"Now then, what should I do after lunch—?"

He could watch a movie, and just lazing around until evening didn't sound too bad. Keiki really thought that this relaxing time would continue. But, about one hour after that, it all completely changed.

An hour later, the Kiryuu siblings had finished eating lunch and were watching TV when the doorbell rang, indicating that they had a visitor. Keiki responded to it, and when he opened the door, he was greeted by a black-haired beauty. It was Tokihara Sayuki, wearing a white blouse and long skirt, giving off a very adult-like aura.

"Good day to you, Keiki-kun."

"Sayuki-senpai, what brings you here?"

"I had some free time so I decided to come over. Here, I brought a cake that I really recommend. Feel free to eat it with Imouto-san."

"Ah, how polite of you."

"Fufu, so Cake-kun is a cannibalist."

"I thought you would say that. It's really not funny… But, since you're here, why don't you come in for a bit?"

"Sorry to intrude~"

Dropping the cake box off in the living room, he guided Sayuki towards his own room.

"Oh, you really keep it clean in here."

"Mizuha is a cleaning freak, so she would definitely scold me if I didn't clean up here from time to time."

"How nice. In the near future, this will be my pen."

"It won't."

"Is there something about me that you aren't satisfied with? I'm a beautiful, big-breasted Onee-san, right? Am I not desirable for boys of your age?"

"Yes. You were undesirable the moment you asked me to make you my pet."

He motioned for Sayuki to sit down on a cushion reserved for guests and sat down next to her.

"So, why did you come here?"

"There is something that I wanted Keiki-kun to see."

"Something you wanted me to see?"

The girl opened her bag and took out a headband with dog ears, and placed it on her head. After that, she also donned an artificial dog tail.

"How is it?"

"Even if you ask me that…"

With the headband disappearing into her natural black hair, the ears completely looked like they were real. Keiki could only watch, wondering what she would do next, completely unable to understand why she would do something like this at her Kouhai's house.

"You don't have to be so wary. I won't do anything weird."

"I think you're doing something pretty weird already…"

"Is it not cute?"

"It's a bit cute, yes."

"Fufu, I like men who are honest."

Actually, Sayuki looked really lovable right now. It had such an impact on him that Keiki completely forgot about the whole pet thing, and found himself wanting to take a picture of her.

"I'm sorry for before," Sayuki said.

"About what, Senpai?"

"When I was supposed to help out with the trash collection. See, uhm, a lot happened, right?"

"Ah. That might be true, yes."

The memories of what had happened under the bridge slowly started to rise to the forefront of Keiki's mind.

"I think that I really went too far there, and I'm reflecting on it. Biting the hand that feeds you like that would make me a failure of a dog."

"I'm not the hand that feeds you, though."

"And, even though I've reflected on it myself, I still feel like there was something lacking from Keiki-kun."

"What do you mean?"

"It's true that I was a bit childish. But that's just because Keiki-kun's love for me wasn't nearly enough."

"Ehhhh…?"

"You see, dogs get nervous when they can't feel enough love and attention from their owners. That's why I came here today: To be cherished by Keiki-kun."

"I do understand the reasoning behind it, but what exactly should I do?"

"I want you to treat me like a dog."

"That's not happening."

"I see, so you won't. Well, I really didn't want to have to use this, but…"

Sayuki slowly took an item out of her bag. It was the BL manga drawn by Nanjou Mao. A doujinshi where Keiki and Shouma — no, Keeki and Shouto were exceptionally close to each other, to put it mildly.

"If you won't, I will be forced to show this to Imouto-san."

"Please refrain from doing that!"

"Then you should know what you have to do, right?"

"………Fine. I will treat Sayuki-senpai like a dog."

When Keiki accepted her conditions, Sayuki let out a beaming smile.

"But what exactly should I do?"

"Have you never played with a dog before, Keiki-kun?"

"I have. We had a big dog at my grandfather's place."

"Then you just have to do to me what you did with that dog."

"Ah, I see. Then… Tokiharsenpai, hand!"

"Woof!"

As Keiki stretched out his hand with these words, Sayuki followed suit and put her own hand on top of his, with a very blissful expression.

Seeing that, Keiki became a bit flustered.

"W-What should I do next?"

"Let me see… I want you to pet me on the head."

"Understood. Then, come over here," Keiki beckoned her to come closer, and Sayuki did as she was told, sitting next to him.

As he started petting her on the head, she happily closed her eyes.

"Fufu… This makes me really happy."

"I'm happy to hear that."

Although Keiki was a bit worried when she asked him to 'Treat her like a dog', skinship of this level was of no problem for him. On the contrary, he even started to enjoy it.

Thinking that, he continued to pet her.

"……"

Before he had realized it, Sayuki was looking straight at him with slightly flushed cheeks and expectant eyes. This look on her face made Keiki even more nervous.

"…Hey, Keiki-kun."

"W-What is it?"

"When you pet a dog on the belly, they get really happy too."

"………Eh?"

A few minutes later, the preparations were done and Sayuki was lying down on top of the bed, face up. She had the three lowest buttons of her blouse opened, leaving her white belly perfectly visible. Normally, dogs won't show their bellies to just anyone, but only to the people they really trust.

Does this mean that Sayuki trusts me this much? As the young boy thought that, he could feel his cheeks getting hotter.

"Hey, hurry up and pet me."

"Y-Yes…"

While sitting next to Sayuki, he nervously started petting her on the belly.

"…Mhm… Fufu, it tickles."

"Yeah, I would think so."

"It feels really weird, and it's even more embarrassing than I thought it would be."

"Then should I stop?"

"No. I've finally gotten Keiki-kun to treat me like a dog, so I won't let it end here. It tickles, and I'm embarrassed, but it still feels very comforting. Do it more."

"Understood."

The girl once more closed her eyes, seemingly enjoying the situation.

And she once more started breathing heavily, which sounded very erotic. It was a bit too stimulating for the young boy.

"You know, I feel like I'm starting to understand what a dog feels like," Sayuki said.

"What do you mean by that?"

"Being pet like this makes me feel all happy inside, and it feels like I don't need anything else in my life. Dogs must want this all the time because they can directly feel the kindness of their beloved owners."

"So Sayuki-senpai is happy?"

"Yes, it feels like I just ate a lot of sweets."

"I don't really get it, but I can tell that you're enjoying it."

"To show Keiki-kun what this feeling is like — I can only do something like this, I think?" Saying that, Sayuki stretched out both of her arms and pulled Keiki into her breasts.

"—Mguh?!"

In that moment, Keiki's face felt really happy. They were so incredibly soft; the best kind of cushion there could ever be. The softness combined with her sweet smell caused Keiki to immediately start to relax.

"What's your impression of your favorite breasts?"

"To put it simply… it's the best."

"Good boy. Ahh, you're so cute. Just how cute can you be, Keiki-kun…?"

Maybe she found the words of her male Kouhai even more stimulating. Her legs started flailing up and down like a little kid's, and she strengthened her grip on Keiki's head. Because of that, Keiki's head started to sink even deeper into her breasts, until—

"Fugah?! Hmmmghghg?!"

Just as one would expect, Keiki's air supply was cut off from being buried inside the girl's big breasts.

It was like heaven and hell at the same time. And just when Keiki started to black out—

"Nii-san, I brought some tea for the two of—"

With terrible timing, the door to Keiki's room opened. If you thought about it objectively, it was pretty obvious that Keiki's mindful little sister would prepare some tea for her guest. And when she entered the room with some tea and sweets, her reaction was to be expected. After all, her big brother was currently face-deep inside a girl's breasts inside his own room, so Mizuha decided to act like she didn't see anything.

"Take your time~" She backed out the door.

"Wait?! I don't need your consideration here!"

Leaving Sayuki behind, Keiki dashed after his little sister. And with that, an emergency family meeting started inside the living room. The reason for that was of course the illicit relations going on inside the house.

"Forcing a girl to wear dog ears and pushing yourself onto her chest like that… Nii-san is quite the pervert after all."

"You're wrong! It's not like that! I was just petting Sayuki-senpai on the belly is all!"

"Petting a girl on the belly? I really can't advocate a hobby like that."

"Ahh?! The more I try to explain the situation, the worse it gets…!"

After that, Keiki got scolded by Mizuha for quite some time.

This must be what it feels like to be scolded by your wife…

Around 3pm, the silhouettes of Sayuki and Keiki could be seen standing in the entrance of Keiki's house.

"I really had fun today."

"It felt like my lifespan shortened when Mizuha walked in on us…"

"Really? It actually felt really good to me."

"Unlike Senpai, I don't feel any pleasure from being embarrassed like that."

After Keiki was freed from Mizuha's long lecture, he had returned to his room, where Sayuki was patiently waiting for him, only for her to tell him "I guess I'll excuse myself for today."

She had only stayed over for about two hours. It seemed like she hadn't planned on staying for too long anyway. As Keiki escorted her to the entrance, he asked her a certain question.

"Sayuki-senpai, can't you find anyone else other than me?"

Back when Sayuki had asked Keiki to 'Make me your pet', Keiki answered with a very direct 'NO!' So why? Why wouldn't she search for someone else—?

That's what he thought.

"There should be other, more suitable people for Senpai that'd be willing to make you their pet, so why—"

What stopped him mid-sentence was Sayuki's finger on his lips. Keiki's heart skipped a beat.

"Even hardcore masochists like me have their pride. I won't give my heart to just anybody, and I don't want to be dominated by anyone else. I can only think of Keiki-kun as my master," With these words, Sayuki came closer and licked Keiki's cheek.

"Sayuki-senpai?!"

"I'm marking you. Since my owner seems to be quite popular, I have to show them that you belong to me, and I to you." Winking at Keiki, she turned around and walked away. "Thanks for today. Thanks to your love, I'm really satisfied."

"Can you not say things that could be easily misinterpreted?"

Leaving words behind that could stir up rumours in the neighbourhood, the girl went home.

Approximately five minutes after Sayuki went home, the doorbell to the Kiryuu household rang again. What greeted Keiki as he opened the door was a beaming smile.

"Hello, Keiki-senpai."

"Yuikchan? What brings you here?"

"Yuika was bored, so she decided to come over and play."

It was like she was switching places with Sayuki. Now it was Keiki's blonde-haired Kouhai, Koga Yuika. Today, she was wearing a skirt, which was a bit on the short side, and a cream-coloured cardigan, which made her give off the impression of an energetic girl.

"Here, please take these sweets Yuika made. Enjoy them with Mizuhsenpai."

"Ah, how polite. I will."

Inside the paper bag she brought, there were several neatly-wrapped madeleines.

"Since you're here already, come on in."

"Sorry to bother~"

Handing over the sweets to Mizuha, who was sitting in the living room, he guided Yuika to his room.

"Woah, this is the first time Yuika has been in Keiki-senpai's room," The blonde-haired beauty looked around the room. "Yuika can't find any perverted books at first glance."

"It would be really bad if you found them that easily."

"So that means that you have some?"

"Uhm……… For now, have a seat."

He motioned for her sit down on the same cushion, and sat down across the table. Mizuha brought some tea into the room, and Yuika voiced her thanks. As Yuika started elegantly sipping the hot tea, Keiki closely inspected her. He had felt this way with Sayuki before, but having a girl inside his own room really did make him quite nervous. After all, she wouldn't just come visit if she didn't have any romantic feelings for him. As an adolescent boy, this kind of thing made him really happy.

But that would only be true if it were a normal girl. And Koga Yuika wasn't normal. Stuffing your freshly-worn panties into the mouth of a boy isn't normal behaviour at all. Though he had a similar uncomfortable feeling with Sayuki, Yuika would become a bit more dangerous if things went south.

"So, what brings you here today?"

"Yuika will just say it outright. She came here to train Keiki-senpai."

"Training, huh……… Wait, training?!"

"Recently, Keiki-senpai hasn't had any respect for Yuika. For example, you took a picture when Yuika was wearing a bunny girl suit, and you grabbed her breasts without her consent. With that in mind, Yuika thought that she needed to teach him what it means to be a slave. She needs to give him a bit of discipline."

"No no, I'm not your slave, you know? I'm really not a big fan of you saying things like 'training' and 'discipline'…"

"Don't worry. Yuika did say 'training,' but it will only be very gentle. She just thought she'd embarrass Keiki-senpai a bit."

"Something embarrassing…? What do you have in mind, then?"

"Precisely this right here!"

In one fluid motion, she took out all the parts to a bunny girl costume: The rabbit ears, the black-netted tights, and the black suit.

But for some reason, Keiki had a really bad feeling as he inspected the costume in front of him.

The size seems to be a bit bigger than the one she wore at the calligraphy clubroom…?

"Uhm… So Yuikchan is going to change into a bunny girl suit here?"

"What are you saying? Keiki-senpai is going to be the one to wear this costume."

"Eh…?"

"Yuika will thoroughly enjoy the sight of an embarrassed Senpai while he wears these clothes."

"Y-You're joking, right?"

"Of course Yuika isn't joking? She is super serious."

Yuika responded to Keiki's shaking voice with a beaming smile, which made him shiver.

This girl is serious. She really wants me to wear this bunny girl costume.

"Are you seriously forcing a boy to wear a bunny girl costume?! Nobody's going to gain anything from that, you know?!"

"If you won't listen, Yuika will be forced to punish you."

"Punish me…?"

"Yuika will show this book to Mizuhsenpai."

"T-That's—?!"

It wasn't the first time he had seen that book cover today. It was the BL manga that Mao-sensei had made. It seemed like every female member of the calligraphy club owned a copy.

Seeing Keiki's reaction, the devilish little Kouhai showed a bewitching smile.

"Now, Keiki-senpai. What will you do?"

"Uuuu…"

"Please choose. Become a bunny girl, or let Mizuha see Senpai's embarrassing BL manga."

"Both of them aren't favorable in any way…"

A: Become a pervert by wearing a full-body bunny girl suit.

B: Let your little sister see the BL manga where you are the model for one of the characters.

Whatever he chose, it would end painfully.

Of course, he didn't want to wear those clothes. He didn't want to feel that embarrassment. But he hated the idea of Mizuha reading the BL manga even more.

Just imagining her reaction… "Nii-san is so filthy." Keiki might as well die from a heart attack if that happened.

"……"

And Kiryuu Keiki's answer was…?

Approximately ten minutes later, Yuika was sitting on the floor, trying to contain her laughter.

"Fu… Ahahaha, Keiki-senpai, it suits you too well… Fufufufufu, Yuika's stomach is starting to hurt."

"Yuikchan, you're laughing way too much…"

The owner of the room said this as he looked down at her. He wasn't wearing his usual clothes. Rabbit ears were protruding upwards from his head. His legs were wrapped in netted tights. On his butt, he had a small, round tail, which only intensified how unbalanced his appearance was. Inside his own room, this high school student was wearing a bunny girl costume. When girls wear such an outfit, it makes every boy's heart flutter, but a boy wearing it looked like a scene straight out of hell. Seeing himself in the mirror made the poor boy want to jump out of a window.

"Fuu, Yuika just laughed enough for a whole year." After rolling around on the floor, hugging her belly, she finally got up. "Let's take a commemorative picture, too."

"Ehhhh…"

"Why are you so shocked by that? Keiki-senpai took a photo of Yuika when she wore that bunny girl costume."

"Just do as you want…"

"Now then, Yuika would like a sexy pose."

"Yes, yes… something like this?"

"Ohh, that leopard-pose is great! Please look over here!"

Yuika looked happy the whole time while she took photos of Keiki.

"Ahaha. To look so happy while wearing clothes that would make any girl embarrassed; Keiki-senpai really is a rascal."

"Rascal?! Did you just call me a rascal?!"

Even though Keiki was the one who was forced to wear these clothes. While he was miffed at being so unreasonably insulted, the Kouhai continued her photo session. After some time, Keiki finally received permission to sit down again. Now a blonde-haired girl and a bunny boy were facing each other at the table. It really was a weird scene to behold. Yuika had an even more comforting smile on her face than before.

"Keiki-senpai really is a weird person."

"You're talking about these clothes?"

"No. She's talking about you. A normal person wouldn't just sit there and let this be done to him."

"Well, you threatened me, so I didn't really have any choice at all."

"…Then, did you start to hate Yuika because she forced you to do this?"

"Eh?" Not expecting a question like that, Keiki looked up at her in surprise.

As he did so, he saw that Yuika was grinning at him.

"Fufu. It's because of that expression that I want Keiki-senpai to become my slave."

Keiki had been played. Although she had done some pretty cruel things to him, he never had hated her for it. Realizing that, Keiki got a bit embarrassed.

"Since Yuika is in a good mood today, she will give Keiki-senpai a reward."

"Reward?"

She stood up on the spot and put her hands under her skirt, only to pull down her cute, blue panties.

"Wait?! Why are you taking off your panties?!"

"Yuika thought that she needed to give Senpai something good to mix it up a bit. It's Yuika's duty as a master to reward her servant from time to time, right?"

"But why does it have to be your underwear?!"

"Well, any boy would love being given a pair of girl's panties, right?"

"Eh? Well, that's…"

"Would they hate it?"

"No, they'd be happy about it. But… how do I say it… it doesn't exactly have to be freshly-worn panties, and what makes them so great is that we can't get them easily."

"Yuika doesn't really understand."

"Do you not have any qualms about just handing out your panties to a boy?"

"Of course Yuika wouldn't do this to just any boy. Keiki-senpai is special to Yuika, after all."

"Special…"

This was something that Yuika had said before. That the only person she wanted to make her slave was Keiki.

"Since you're special to Yuika, she would always give you her panties if it made you happy."

This reminded Keiki of when Yuika had confessed to him that she wanted him to become her slave. Thinking that it would make him happy, she took off her panties at the time. Though her means were a bit strange, she did just want to make him happy.

"………"

"What happened? You're just staring at Yuika."

Once Keiki had found out about Tokihara Sayuki's and Koga Yuika's real personalities, he had thrown away the possibility that one of them might actually be Cinderella. But even Ootori Koharu, a perverted stalker girl, had fallen in love with Shouma. She became a stalker exactly because she felt that way towards him.

What if Sayuki and Yuika were the same? What if their 'love' turned them into total perverts?

"Uhm, Senpai? It's pretty embarrassing if you keep staring at Yuika like that…"

"O-Oh yeah, sorry…"

His Kouhai's cheeks were slightly flushed. Just like that, she suddenly returned to being a normal girl in Keiki's eyes. Her cute, embarrassed expression completely threw Keiki off balance.

"Also… Fufu, if you make such a serious face while wearing those clothes, Yuika might start laughing again."

"You were the one who told me to wear them… Well, I guess I can change back now. Yuikchan, would you be so kind as to leave the room for a second?"

"Yes, Yuika will do that."

She went to stand up, but had completely forgotten that her blue panties were still pulled down around her thighs. Because of that, she lost her balance, and—

"…E-Eh?"

As expected, her small body started falling over.

"Kya?!"

"Careful!"

Keiki tried to catch her, reaching overtop of the table with his hand, only for him to fall over as well with a loud crash. Fortunately, it didn't seem like Yuika was hurt. Her sweet aroma and the feeling of her soft shoulders were making his head spin, but he soon got a hold of himself.

"Are you okay?"

"Y-Yes. Yuika is fine…"

Hugging, and being hugged, the distance between the two of them was practically nonexistent. And in that position, their gazes met. The young girl's blue eyes were watery, and her shoulders were tensing up, showing that she was indeed a bit nervous. That sight of her was so cute, that Keiki completely forgot to let go of her—

"Nii-san? I heard a really loud noise just now, but—"

And with the worst possible timing as usual, the door opened.

"Ah—, am I interrupting something?"

Even with that weird scene in front of her, Mizuha reacted rather calmly. Keiki was still wearing a bunny suit, while Yuika wasn't wearing any panties. And the two of them were practically hugging each other.

"Wai–?! This was definitely not supposed to happen?!"

"Yep. Though that's supposed to be my line," Mizuha grinned as she closed the door.

Keiki hurriedly chased after her, but he completely forgot that he was still wearing the bunny girl suit. This of course resulted in an icy cold glare from Mizuha.

"I didn't think that Nii-san had a hobby like that."

"This is the biggest misunderstanding of the century!"

"Did you force your Kohai to take off her panties?"

"Yuikchan just took them off on her own accord!"

"There's no way that there'd be a girl like that, right?"

"Well, apparently there is! There are countless girls you'd never imagine would exist!"

"Are we still talking about the same world? Is this an Isekai?"

"Uuuuuoooooo?! My little sister doesn't trust her Onii-chan's words!!!"

The misunderstanding only continued to grow. And it took him about 30 minutes until his little sister finally started to trust her big brother again.

After Yuika had gone home for the evening, the Kiryuu household finally calmed down again. The two of them finished eating Mizuha's delicious dinner, and he let her use the bath first while he returned to his room. Currently, he was laying on his bed, checking his smartphone.

"…Oh, I've got some messages."

During the time he had been eating dinner, he had left his phone in his room. When he checked the contents of the messages—

'I went on a date with Koharu-chan' 'I went on a date with Shoumkun' 'I finished the new manuscript' 'I want Kiryuu-kun's underwear. I wanna sniff it' and so on, so Keiki just wrote short responses to all of them.

As for the date report, he sent a blessing, but still mentally cursed them with 'Normies should just explode'. To the BL manga creator, he wrote 'Good work~'. And finally, to the sexual harassment email, he wrote 'Why don't you just sniff your own panties, then?'. And, just when he had finished responding to all of them, a new message came in.

"Nanjou?"

After he had responded to her email, she had written him a short message.

'Can we talk right now?'

Since he didn't have any reason to decline, he answered with a short 'Yeah, sure,' and shortly after that Nanjou called him on the phone.

「—Evenin', Kiryuu.」

"It's pretty rare for Nanjou to call me. Did something happen?"

「Right now, I'm drawing a scene where Shouto is playing with Keeki's nipples.」

"Is it okay if I hang up?"

「Wait wait! I'm having trouble drawing it, so I was hoping that maybe you could help me out.」

"I imagine I'm gonna regret asking, but what do you have in mind?"

「Can you moan for me? I wanna know what it sounds like when someone plays with your nipples.」

"I wholeheartedly decline!"

「Then, something else. Did President and Yuika come over to your house today by any chance?」

"I'm surprised you know that."

「The two of them were proudly talking about their plans in the clubroom. And I was listening to them while I was working on my manuscript.」

"I see. So they were planning it ahead of time."

Keiki had thought that Yuika's timing was a bit too perfect, but it seems like they were taking turns. It really made Keiki wonder if they were actually on good terms with each other or not.

「I actually meant to obstruct them, but the deadline for my manuscript made it impossible for me.」

"Is there even a time when you don't have a deadline for anything?"

「So… nothing happened, I presume?」

"A lot happened, but I don't really want to talk about it."

Especially not about the part when he was forced to wear a bunny girl suit.

「I see… Hm, it seems good so far.」

"What does?"

「Nothing. I was just a bit relieved.」

"???" Keiki tilted his head after hearing that from the other side of the call.

And since this was a phone call, he couldn't guess anything from her expression.

「Hey, Kiryuu… Have you ever gone out with a girl before?」

"Excuse me? What's with that so suddenly?"

「I know that you don't have a girlfriend right now, but what about middle school? I was just a bit curious.」

"I didn't have one. Sadly."

「I see. Just as I imagined.」

"I'm gonna pretend that I didn't hear that comment…"

「…Then, for example… what about… me?」

"Eh…?"

「I'm just joking.」

"Don't say that! That's bad for my heart! It made my heart race, so please don't make any jokes like that!"

「Ah, I made your heart race, huh? …Fufu.」

"Why do you seem so happy about that?"

「I-It's nothing. —Well, I'm hanging up now. Night!」

She suddenly started talking faster and hung up immediately.

"What was that about…?"

Keiki had no idea what Mao had planned with that. Maybe she really just wanted to hear his moaning voice, but it still felt like there was more to it.

But, Keiki had no one except himself to blame for his inability to see this flower of youthful love that was blooming before his eyes.

It was immediately after his phone call with Mao. Mizuha came to his room wearing pyjamas, having finished taking her bath. For some reason, she was holding her favourite hairdryer.

"Nii-san, will you dry my hair?"

"Eh? Ahh, yeah. Sure! Can do."

Hearing Keiki agree to her request, she walked up next to him and sat down. But for some reason, she sat down on Keiki's lap as he was sitting on the bed.

"Eh, there?"

"Here is fine."

"Are you a spoiled child now, Mizuha?"

"It's the privilege of a little sister to be spoiled by her big brother."

"I can't say anything if you use your influence here."

"Mhm. You may start~!"

"What kind of queen are you?"

As he let out a small giggle, he started drying his little sister's hear. After he started, Mizuha closed her eyes, seeming to enjoy it.

The both of them had done this on a regular basis when they were younger. But, no matter how close they might have been, there were still a boy and a girl. They couldn't take a bath together anymore, and they had started sleeping in separate futons. Although it felt like there was a certain barrier between the two of them after today's events, he decided to forget about it for now.

"—And, done."

"Thanks."

Though she gave Keiki her thanks, she didn't move from her spot. Rather, she leaned her back against him like a relaxed cat.

"I was really surprised today. To think that those two girls were actually perverts."

"It was the same for me when I first found out."

Because Keiki had to explain the situation to her earlier, he had no other choice but lay bare the true identity of Sayuki and Yuika. If he didn't, he would be the one treated as a pervert instead.

"This turned out to be rather interesting, right, Nii-san?"

"It's really not interesting at all."

"Might it be that you're a bit happy to be so popular like this?"

"That's not…"

"They might actually be a good fit for Nii-san. You're a siscon, after all."

"Being a siscon doesn't make me a pervert!"

She really has a sharp tongue today…

Since she very rarely got mad, this was quite the unusual occurrence for Keiki.

"…Mizuha, are you mad?"

"I'm not really mad. It's just…" She turned around to look at Keiki, and with a sulking expression, she continued, "Nii-san—is my Nii-san alone, okay?"

She sounded like she was blaming her cheating boyfriend, like she wanted to claim sole ownership of her big brother.

Conclusion: Keiki became a siscon because his little sister Mizuha was just too cute.

A little sister's all you need, huh…

After taking a bath, Keiki returned to his own room. He guessed that his little sister had already gone to sleep because the lights were out in her room.

"I guess I'll go to sleep as well."

It was already past ten at night. Though it was a bit earlier than when he normally went to bed, a lot had happened today, which made him feel a bit more tired than usual.

"But, before that…"

He turned over the mattress of his bed. Underneath said mattress were wood panels. Once he pushed on one of the panels, the cover opened, revealing a small box. A secret space that nobody except for him knew about.

Along with the love letter, he also hid the panties of the girl in there. And his porn magazines, of course.

People always feel the urge to keep an eye on their secret treasures. Recently, it had become Keiki's habit to check on the love letter and panties every night before he went to sleep.

Well, I just checked this morning, so they should still be there…

And just as he had guessed, the pink envelope was present.

"……Huh? Eh? W-Why?!"

But even though he had just checked this morning, a crucial item was missing from the hidden box.

"Cinderella's panties… are gone?"

For Keiki, it was like Cinderella's glass shoe. That one and only physical hint had completely disappeared.

Part 2:

Cinderella's panties had disappeared from Keiki's room. For now, Keiki deduced that his little sister Mizuha hadn't taken them. After all, if that were the case, the next morning would have started with a greeting from Mizuha, saying "Nii-san, whose panties are these?", followed by an emergency family meeting. That only left two possible candidates.

Tokihara Sayuki and Koga Yuika.

Both of them had a chance to steal the panties while Keiki was busy explaining the circumstances with Mizuha.

"Maybe one of them really is Cinderella…"

The following day, after class.

In the astronomy club room, an emergency Cinderella meeting took place. The topic of the meeting was, of course, 'The stolen panties', and the number of participating members were three. With her trademark hoodie, Koharu was sitting on a chair, with Shouma next to her. Across the table was the victim.

As an aside, as per Shouma's request, the photos on the ceiling inside the astronomy club room were all disposed of. Though the photos on the walls were still present, the aura in the air was less intimidating than before. After Keiki's successful (?) work as a cupid, Koharu had agreed to further help him concerning the Cinderella case, which is why she had offered him the astronomy club room as the 'Head office of the Cinderella search corps'.

"Though I'm more surprised that the Cinderella candidates are actually perverts. Tokiharsenpai is a hardcore masochist, Kogsan is a hardcore sadist, and Mao-chan is a fujoshi… I still can't believe it."

After the explanations were over, Shouma was also up-to-date just like Koharu. He seemed very surprised that all of the members of the calligraphy club were perverts.

"Keiki, you seem to have it pretty rough, I see."

"Aren't you forgetting that you're not just a bystander in Nanjou's case? She's drawing a BL manga with the both of us in it, you know."

"Well, I don't really mind if it's Keiki and me."

"Geh?!"

"S-Shoumkun?!"

After a short pause, the person who created such a frozen atmosphere started giggling.

"Ahahaha, I'm just joking. Boys aren't in my strike zone."

"There are good and bad jokes, you know?"

"I-I thought my heart was about to stop…"

With that, they returned to the topic at hand.

"I initially thought that neither Sayuki-senpai nor Yuikchan were Cinderella. To me it seemed like they just wanted me to become either their master or slave. I didn't think that either of them held any special affection towards me, but…"

"But?"

"Yesterday, both Sayuki-senpai and Yuikchan were wearing pink underwear."

"Hm? Underwear? What's that about?"

"It's a lucky charm. When confessing to the boy you like, wearing pink underwear will increase your odds of him saying yes. Or so the superstition goes."

"Ohh, so that's why."

"When Sayuki-senpai confessed, she also wore pink underwear. And the panties that Yuika stuffed in my mouth were also pink."

There is no way that Keiki could forget those two scenes. He remembered the color of their underwear as clear as day.

"And the envelope to the love letter is also pink."

"…I see. It sounds like too much of a coincidence."

A lot of girls know of that lucky charm. Keiki really couldn't believe that this all had happened by pure chance.

"So I guess that there's a chance that either one of them, or possibly both of them, are in love with Kiryuu-kun…"

"Uuu, it makes me feel a bit embarrassed if you put it like that, but it seems plausible."

He recalled what had happened the day prior. Sayuki's soft-feeling body, and Yuika's embarrassed expression. Thinking that they might have some sort of affection for him, he felt the blood rush to his head.

"Well, it's true that the two of them have a high chance of being Cinderella."

"Yes, considering that Cinderella's panties disappeared from Keiki's room. And exactly on the day when the two of them paid you a visit."

"So Cinderella wanted to take back her panties?"

"It would make sense, yeah."

"But that means something very important."

"What do you mean?"

"If it really was Cinderella, why did she take the panties with her, but not the love letter?"

"…So, she really did drop her panties by accident…?"

"Maybe she panicked when she heard Keiki returning to the room at the time."

"But, that still leaves the mystery of why she even had a new pair of panties with her in the first place."

Possibly because she had meant to change into them later on. But there was no way to actually find out, except for asking the person herself.

"Maybe it's actually an important clue that Cinderella took the panties back with her. That means that the person who currently is in possession of them should be the girl who wrote the love letter."

"Yeah. That would be definite proof."

For some reason, Cinderella is hiding her real identity from Keiki. That would explain why she didn't put her name on the love letter.

What Keiki needed now was certain proof that the candidate was indeed Cinderella. And the panties themselves had very conveniently turned into that proof.

"Now you have another clue concerning Cinderella at least."

"Yeah…"

He once more needed to investigate both Sayuki and Yuika. One of them must be the 'thief'.

"But how can I actually find out if Cinderella really has the panties with her…"

"How about flipping their skirts?" Shouma suggested.

"Rejected."

"Should I investigate? I'm really good at that sort of thing," Koharu offered.

"I don't think that investigating that would be a good idea."

Though Koharu could probably put up a camera inside the girl's changing room, the risk would be too great. What would happen if someone found that camera?

"Well, what else could you do, Kiryuu?"

"Say, Kiryuu-kun, who do you think Cinderella is?"

"Let me think…"

Between Sayuki and Yuika, who had the highest possibility of being Cinderella? Judging from the information at hand, the scales drastically tipped towards a certain girl.

The door to the room wasn't locked, and one girl was currently sitting in said room. As she stood by the window, the soft summer breeze gently made her hair flutter, and when she noticed Keiki's presence, she slowly turned around.

"Oh, you're awfully late. I didn't think that you would come by today."

"It's just Sayuki-senpai here?"

"The other two didn't think that you would come by, so they went home already. I happened to run into Keiki-kun because I stayed behind, fufu."

"Why do you sound so happy about that?"

While he was saying that, he had a completely different thought in his mind. And that was nothing more than the girl who was currently right in front of him. Keiki's Senpai, the club president of the calligraphy club, and a hardcore masochist. Additionally, a Cinderella candidate with a very high potential of being the true Cinderella; Tokihara Sayuki.

On the day of the cleaning operation, she was the last girl to leave the club room according to Mizuha. Basically, she was the person who stayed behind the longest. She really had the highest possibility of being the Cinderella who left behind that love letter.

"Keiki-kun, what's wrong?" She looked at Keiki with a perplexed expression.

At first glance, she was just like always. Her gestures, her way of talking, her atmosphere. It was the normal Tokihara Sayuki. If she really was Cinderella, she was playing it cool really well.

"I have something important to talk about with Sayuki-senpai."

"What might that be? I won't tell you my three sizes, you know?"

"That's not it at all."

"Then… do you finally want to make me your pet?"

The girl said this clearly in jest. But Keiki answered seriously, and contrary to her expectations.

"That's right. I might actually just do that."

"……Eh?" The girl's eyes opened wide in surprise.

While the girl was still standing at the window, Keiki softly put his hand on her snow white cheeks. This might actually be the turning point of their relationship. It might result in destroying their Kouhai-Senpai relationship, and forming a new bond. Keiki said the words that Sayuki had been waiting for for so long.

"—I will become Sayuki-senpai's owner."

Chapter end